# social proof

> English word · Noun

## Definitions
1. A psychological and social phenomenon wherein people copy the actions of others if unsure how to behave.

## Etymology
Coined by Robert Cialdini in his 1984 book Influence.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/social-proof